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Identification of quantitative trait loci influencing aerial morphogenesis in the model legume Medicago truncatula.
- Source :
-
TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik [Theor Appl Genet] 2007 May; Vol. 114 (8), pp. 1391-406. Date of Electronic Publication: 2007 Mar 21. - Publication Year :
- 2007
-
Abstract
- In many legume crops, especially in forage legumes, aerial morphogenesis defined as growth and development of plant organs, is an essential trait as it determines plant and seed biomass as well as forage quality (protein concentration, dry matter digestibility). Medicago truncatula is a model species for legume crops. A set of 29 accessions of M. truncatula was evaluated for aerial morphogenetic traits. A recombinant inbred lines (RILs) mapping population was used for analysing quantitative variation in aerial morphogenetic traits and QTL detection. Genes described to be involved in aerial morphogenetic traits in other species were mapped to analyse co-location between QTLs and genes. A large variation was found for flowering date, morphology and dynamics of branch elongation among the 29 accessions and within the RILs population. Flowering date was negatively correlated to main stem and branch length. QTLs were detected for all traits, and each QTL explained from 5.2 to 59.2% of the phenotypic variation. A QTL explaining a large part of genetic variation for flowering date and branch growth was found on chromosome 7. The other chromosomes were also involved in the variation detected in several traits. Mapping of candidate genes indicates a co-location between a homologue of Constans gene or a flowering locus T (FT) gene and the QTL of flowering date on chromosome 7. Other candidate genes for several QTLs are described.
- Subjects :
- Chromosome Mapping
Chromosomes, Plant genetics
Flowering Tops genetics
Flowering Tops growth & development
Medicago truncatula anatomy & histology
Plant Leaves genetics
Plant Leaves growth & development
Plant Stems genetics
Plant Stems growth & development
Medicago truncatula genetics
Medicago truncatula growth & development
Plant Components, Aerial genetics
Plant Components, Aerial growth & development
Quantitative Trait Loci
Quantitative Trait, Heritable
Subjects
Details
- Language :
- English
- ISSN :
- 0040-5752
- Volume :
- 114
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
- Publication Type :
- Academic Journal
- Accession number :
- 17375280
- Full Text :
- https://doi.org/10.1007/s00122-007-0525-1